Genetic loci on chromosome 5 are associated with circulating levels of interleukin-5 and eosinophil count in a European population with high risk for cardiovascular disease

Olga McLeod, Angela Silveira, Elsa Valdes-Marquez, Harry Björkbacka, Peter Almgren, Karl Gertow, Jesper R. Gådin, Alexandra Bäcklund, Bengt Sennblad, Damiano Baldassarre, Fabrizio Veglia, Steve E. Humphries, Elena Tremoli, Ulf de Faire, Jan Nilsson, Olle Melander, Jemma C. Hopewell, Robert Clarke, Hanna M. Björck, Anders Hamsten & 2 others John Öhrvik, Rona J. Strawbridge

Research output: Contribution to journalArticle

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Abstract

IL-5 is a Th2 cytokine which activates eosinophils and is suggested to have an atheroprotective role. Genetic variants in the IL5 locus have been associated with increased risk of CAD and ischemic stroke. In this study we aimed to identify genetic variants associated with IL-5 concentrations and apply a Mendelian randomisation approach to assess IL-5 levels for causal effect on intima-media thickness in a European population at high risk of coronary artery disease. We analysed SNPs within robustly associated candidate loci for immune, inflammatory, metabolic and cardiovascular traits. We identified 2 genetic loci for IL-5 levels (chromosome 5, rs56183820, BETA=0.11, P=6.73E-5 and chromosome 14, rs4902762, BETA=0.12, P=5.76E-6) and one for eosinophil count (rs72797327, BETA=-0.10, P=1.41E-6). Both chromosome 5 loci were in the vicinity of the IL5 gene, however the association with IL-5 levels failed to replicate in a meta-analysis of 2 independent cohorts (rs56183820, BETA=0.04, P=0.2763, I2=24, I2-P=0.2516). No significant associations were observed between SNPs associated with IL-5 levels or eosinophil count and IMT measures. Expression quantitative trait analyses indicate effects of the IL-5 and eosinophil-associated SNPs on RAD50 mRNA expression levels (rs12652920 (r2=0.93 with rs56183820) BETA=-0.10, P=8.64E-6 and rs11739623 (r2=0.96 with rs72797327) BETA=-0.23, P=1.74E-29, respectively). Our data do not support a role for IL-5 levels and eosinophil count in intima-media thickness, however SNPs associated with IL-5 and eosinophils might influence stability of the atherosclerotic plaque via modulation of RAD50 levels.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalCytokine
Volume81
DOIs
Publication statusPublished - May 1 2016

Fingerprint

Chromosomes, Human, Pair 5
Genetic Loci
Interleukin-5
Chromosomes
Eosinophils
Cardiovascular Diseases
Population
Single Nucleotide Polymorphism
Chromosomes, Human, Pair 14
Atherosclerotic Plaques
Random Allocation
Meta-Analysis
Coronary Artery Disease
Computer aided design
Genes
Stroke
Modulation
Cytokines

Keywords

  • Eosinophil count
  • Genetics
  • IL-5
  • Intima-media thickness
  • RAD50
  • Subclinical atherosclerosis

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy
  • Hematology
  • Biochemistry
  • Molecular Biology

Cite this

Genetic loci on chromosome 5 are associated with circulating levels of interleukin-5 and eosinophil count in a European population with high risk for cardiovascular disease. / McLeod, Olga; Silveira, Angela; Valdes-Marquez, Elsa; Björkbacka, Harry; Almgren, Peter; Gertow, Karl; Gådin, Jesper R.; Bäcklund, Alexandra; Sennblad, Bengt; Baldassarre, Damiano; Veglia, Fabrizio; Humphries, Steve E.; Tremoli, Elena; de Faire, Ulf; Nilsson, Jan; Melander, Olle; Hopewell, Jemma C.; Clarke, Robert; Björck, Hanna M.; Hamsten, Anders; Öhrvik, John; Strawbridge, Rona J.

In: Cytokine, Vol. 81, 01.05.2016, p. 1-9.

Research output: Contribution to journalArticle

McLeod, O, Silveira, A, Valdes-Marquez, E, Björkbacka, H, Almgren, P, Gertow, K, Gådin, JR, Bäcklund, A, Sennblad, B, Baldassarre, D, Veglia, F, Humphries, SE, Tremoli, E, de Faire, U, Nilsson, J, Melander, O, Hopewell, JC, Clarke, R, Björck, HM, Hamsten, A, Öhrvik, J & Strawbridge, RJ 2016, 'Genetic loci on chromosome 5 are associated with circulating levels of interleukin-5 and eosinophil count in a European population with high risk for cardiovascular disease', Cytokine, vol. 81, pp. 1-9. https://doi.org/10.1016/j.cyto.2016.01.007
McLeod, Olga ; Silveira, Angela ; Valdes-Marquez, Elsa ; Björkbacka, Harry ; Almgren, Peter ; Gertow, Karl ; Gådin, Jesper R. ; Bäcklund, Alexandra ; Sennblad, Bengt ; Baldassarre, Damiano ; Veglia, Fabrizio ; Humphries, Steve E. ; Tremoli, Elena ; de Faire, Ulf ; Nilsson, Jan ; Melander, Olle ; Hopewell, Jemma C. ; Clarke, Robert ; Björck, Hanna M. ; Hamsten, Anders ; Öhrvik, John ; Strawbridge, Rona J. / Genetic loci on chromosome 5 are associated with circulating levels of interleukin-5 and eosinophil count in a European population with high risk for cardiovascular disease. In: Cytokine. 2016 ; Vol. 81. pp. 1-9.
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AU - McLeod, Olga

AU - Silveira, Angela

AU - Valdes-Marquez, Elsa

AU - Björkbacka, Harry

AU - Almgren, Peter

AU - Gertow, Karl

AU - Gådin, Jesper R.

AU - Bäcklund, Alexandra

AU - Sennblad, Bengt

AU - Baldassarre, Damiano

AU - Veglia, Fabrizio

AU - Humphries, Steve E.

AU - Tremoli, Elena

AU - de Faire, Ulf

AU - Nilsson, Jan

AU - Melander, Olle

AU - Hopewell, Jemma C.

AU - Clarke, Robert

AU - Björck, Hanna M.

AU - Hamsten, Anders

AU - Öhrvik, John

AU - Strawbridge, Rona J.

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